Table 2 Summary of overall effects
| Â | Mean | Median | Min-Max |
|---|---|---|---|
A: By scheme (n= 23) | |||
 Number of significant effect sizes | 14.17 | 7.00 | 0–73 |
 Number of effect sizes | 26.95 | 18.00 | 1–108 |
 Proportion of significant effect sizes | 0.53 |  |  |
B: By study (n= 37) | |||
 Number of significant effect sizes | 8.81 | 6.00 | 0–38 |
 Number of effect sizes | 16.76 | 12.00 | 1–108 |
 Proportion of significant effect sizes | 0.60 |  |  |
| Â | Total | Statistically significant | Proportion |
Total reported effect sizes | 620 | 326 | 0.53 |